Storyline: daily ambush attacks on th guild by xxx (goblins, leeches, bog wraiths... vallus, zuur) and the guild has the day to hold defense. Since it is an ambush, everyone scrambled for the fight, and therefore can only use one weapon - the frying pan!

Rewards: whatever relevant, maybe further increase guild favors (or maybe allow guild master/officer to allocate where to place the increase)

Penalty: guild debuff (opposite of guild favors)... effects on inactive/abandoned guilds after 80 days inactivity, the guild can be so debuffed that it is crippled, and wiped out from the system?